👋 Hi, I'm Yihang Liu

Full-Stack Software Engineer | Cloud Architecture Enthusiast

🎓 Master's in Computer Science @ University of Sydney | Bachelor's in Computing & Software Systems @ University of Melbourne
💼 3+ years of experience in fintech and enterprise software development
🌏 Based in Sydney, Australia

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🚀 About Me

• 🔭 Currently leading ISGIS (Intelligent Security Guard Information System) - A distributed microservices platform with AI-powered report analysis
• 🌱 Exploring AI/ML integration with LangChain, Ollama, and advanced cloud-native architectures
• 💡 Passionate about microservices architecture, payment systems, and cloud computing
• 🏗️ Built high-availability payment systems processing 150K+ daily transactions with 99.99% uptime
• 👯 Open to collaborate on open-source projects and innovative fintech solutions
• 💬 Ask me about AWS, Spring Boot, .NET Core, microservices, or payment processing

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🛠️ Tech Stack

Languages

Frameworks & Libraries

Cloud & DevOps

Databases

Tools & Practices

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💼 Featured Projects

🏗️ Enterprise-Level Systems

🤖 ISGIS - Intelligent Security System AI-Powered Distributed Microservices Platform 🔹 Role: Project Lead & Full-Stack Engineer 🔹 Tech Stack: Spring Boot, Spring Cloud, React, Next.js 🔹 Highlights: Built microservices with Eureka, Gateway, Config Server Integrated LangChain4j + Ollama for AI report analysis Implemented Prometheus + Grafana monitoring PostgreSQL + MongoDB hybrid database architecture Status: 🚀 Active Development (2025)

💳 Global Payments Oceania API Real-Time Payment Processing Platform for Australian Market 🔹 Role: Software Engineer 🔹 Tech Stack: .NET Core, AWS Lambda, DynamoDB, API Gateway 🔹 Highlights: State-of-the-art RESTful API with NPP (New Payments Platform) integration Real-time PayOut and PayTo transaction processing Handles 150K+ daily transactions with 99.99% uptime PCI DSS compliant serverless microservices architecture Deep integration with Australia's National Payment Platform Status: ✅ Production (2022-2024)

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📊 GitHub Stats

💻 Most Used Languages

Note: GitHub stats reflect public repositories. In professional work, I primarily use Java and C# for enterprise-level microservices and payment systems.

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🏆 GitHub Trophies

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🎯 Core Competencies

💡 Domain	🛠️ Expertise
☁️ Cloud Architecture	AWS Lambda, DynamoDB, API Gateway, Step Functions, Serverless Computing
🏗️ Microservices	Spring Cloud (Eureka, Gateway, Config), .NET Core, Service Mesh, API Design
💳 Payment Systems	High-throughput transaction processing, PCI DSS compliance, Financial security
🤖 AI Integration	LangChain, Ollama, Llama, GPT integration in enterprise applications
🌐 Full-Stack Development	React, Next.js, Blazor, RESTful APIs, Modern web applications
📊 Database Design	PostgreSQL, MySQL, DynamoDB, MongoDB, Hybrid architectures
🔧 DevOps & Monitoring	Docker, CI/CD, Prometheus, Grafana, Azure DevOps, NewRelic

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🤝 Connect with Me

WeChat ID: akyh1234

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Every line of code has the potential to change the world

⭐️ From yihangYH